 Okay, so this one's number nine for everybody on the practice test practice exam three calculate the boiling point of a 4.35 mole l so little m is mole l So that's moles So calculate the boiling point of a 4.3 mole l benzene solution and phenol Okay, so how do we do this? Well, first of all, you got to remember that this is Collegative properties, so we're going to do be doing a boiling point elevation for the solution here, okay? so When we know that we know that We got to use the this equation the change of the Delta TV equals K V times Molal, okay, or the solution concentration, okay? Molality so K V One mole l And remember that that has to be given to you and the boiling point actually has to be given to you too But we're not using it yet. We will use it in the second and of course the molality is given to us 4.35 of course That cancels with that there So all we got to do is multiply These two numbers this three point so that's going to be 13 point to degree Celsius So that's the change in the boiling it asks us to calculate the boiling point of the solution Okay, so it doesn't ask us to calculate the change in boiling point So we got to figure out what the new boiling point is so the new boiling point Say the new equals the original boiling point the change in boiling So the original 181.7 22 degrees C so the new temperature is 185.0